Distance Protection Methodology for Detection of Faulted Phase and Fault Along With Power Swing Using Apparent Impedance

Behaviour analysis of H‐bridge high‐voltage capacitor banks fault on 230‐kV substation using discrete wavelet transform

“…Moreover, it also identified fault phase. Several capacitor units connecting inside capacitor bank were not obstacles for detecting and identifying faults which are superior to previous research [12][13][14][15][16][17][18][19][20][21][22][23]. • The performances of the proposed method were also verified by comparing the value that is calculated based on the theory of IEEE standard C37.99-2012 [24].…”

“…Several methods [14,15] have been proposed to reduce the damage caused by faults. A fault can be detected by studying the behaviour of impedance which agrees to Ohm's law [16,18]. In addition, the influence of inrush current when the capacitor bank switches ON in a power substation also affects the life time of the equipment installed in the substation.…”

“…According to the advantage of each method, researchers combined different methods together, such as the wavelet and artificial neural network (ANN), for achieving maximum efficiency [8, 9]. In this study, we aim to address the problem of capacitor bank protection; therefore, it extends the work done by previous studies on fault occurrence [10, 11] and capacitor banks [12–17].…”

“…According to the result of literatures reviewed [1–22], it is found that previous research mostly focused on low‐voltage capacitor bank, in which a capacitor unit was less than 20 units. Meanwhile, there is rarely research that focused on high‐voltage capacitor bank, in which capacitor units connected inside the bank were more than 100 units.…”

Working State of Diesel Engine Cylinder Based on Continuous Wavelet Transform Algorithm

“…At the same time, the fuel supply system of the diesel engine is relatively simple, and the compression ratio of the diesel engine is high. At the same time, under the same power, the torque of the diesel engine is large, and the speed is low at the maximum power, which ensures its function in the engine to the greatest extent [11][12].…”